使用java中的命令提示符(Using the command prompt from java)

 我试图用一些简单的命令为Windows命令提示符创建一个Java GUI。 我有一些额外输入的问题。 我可以运行“dir”命令但是当我运行“del”命令时，我需要给出确认，但我似乎无法打印出确认消息。 
 
public static void main(String args[])
{
    try {
        Process p = Runtime.getRuntime().exec("cmd /c dir");
        read(p);
    } catch (IOException e) {
        e.printStackTrace();
    }
}

private static void read(Process p)
{
    try{
        BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
        String line = null;
        while((line=input.readLine()) != null) {
            System.out.println(line);
        }   
    }
    catch(IOException e1) { e1.printStackTrace(); }
}
 
 输出： 
 
 Volume in drive E has no label.
 Volume Serial Number is E9ED-7E32

 Directory of E:\Code\workspace\Project

04/11/2012  11:07 PM    <DIR>          .
04/11/2012  11:07 PM    <DIR>          ..
04/11/2012  09:53 PM               301 .classpath
04/11/2012  09:53 PM               383 .project
04/11/2012  09:53 PM    <DIR>          .settings
04/12/2012  12:09 AM    <DIR>          bin
04/12/2012  12:09 AM    <DIR>          src
04/11/2012  11:07 PM    <DIR>          test
               2 File(s)            684 bytes
               6 Dir(s)  429,106,937,856 bytes free
 
 但是运行它会导致它挂起在line=input.readLine() 
 
public static void main(String args[])
{
    try {
        Process p = Runtime.getRuntime().exec("cmd /c del test");
        read(p);
        OutputStream oStream = p.getOutpuStream();
        BufferedWriter sWriter = new BufferedWriter(newOutputStreamWriter(oStream));
        sWriter.write("y");
        sWriter.newLine();
        oStream.close();
        read(p);
    } catch (IOException e) {
        e.printStackTrace();
    }
}
 
 我该如何防止这种悬挂？ 我也担心确认“y”没有正确发送。 我觉得它应该读取输出并写入输入，但这是我在多个站点在线发现的方式。 任何帮助，将不胜感激。 

I am trying to make a Java GUI for the windows command prompt with some simple commands. I am having some issues with additional input. I can run the "dir" command but when I run the "del" command, I need to give a confirmation, but I cant seem to get it to print out the confirmation message. 
 
public static void main(String args[])
{
    try {
        Process p = Runtime.getRuntime().exec("cmd /c dir");
        read(p);
    } catch (IOException e) {
        e.printStackTrace();
    }
}

private static void read(Process p)
{
    try{
        BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
        String line = null;
        while((line=input.readLine()) != null) {
            System.out.println(line);
        }   
    }
    catch(IOException e1) { e1.printStackTrace(); }
}
 
Output: 
 
 Volume in drive E has no label.
 Volume Serial Number is E9ED-7E32

 Directory of E:\Code\workspace\Project

04/11/2012  11:07 PM    <DIR>          .
04/11/2012  11:07 PM    <DIR>          ..
04/11/2012  09:53 PM               301 .classpath
04/11/2012  09:53 PM               383 .project
04/11/2012  09:53 PM    <DIR>          .settings
04/12/2012  12:09 AM    <DIR>          bin
04/12/2012  12:09 AM    <DIR>          src
04/11/2012  11:07 PM    <DIR>          test
               2 File(s)            684 bytes
               6 Dir(s)  429,106,937,856 bytes free
 
But running this will cause it to hang at line=input.readLine()
 
public static void main(String args[])
{
    try {
        Process p = Runtime.getRuntime().exec("cmd /c del test");
        read(p);
        OutputStream oStream = p.getOutpuStream();
        BufferedWriter sWriter = new BufferedWriter(newOutputStreamWriter(oStream));
        sWriter.write("y");
        sWriter.newLine();
        oStream.close();
        read(p);
    } catch (IOException e) {
        e.printStackTrace();
    }
}
 
How do I prevent this hanging? I am also concerned that the confirmation "y" isn't being sent correctly. I feel like it should be read the output and write the input, but this is the way that I found at multiple sites online. Any help would be appreciated. 

原文：https://stackoverflow.com/questions/10117373